mirror of
https://github.com/weechat/weechat.git
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Sébastien Helleu
6cfb31c306
This extension is used to compress and decompress websocket frames (using the DEFLATE algorithm, with zlib).
81 lines
3.9 KiB
C
81 lines
3.9 KiB
C
/*
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* Copyright (C) 2013-2024 Sébastien Helleu <flashcode@flashtux.org>
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*
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* This file is part of WeeChat, the extensible chat client.
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*
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* WeeChat is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* WeeChat is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with WeeChat. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef WEECHAT_PLUGIN_RELAY_WEBSOCKET_H
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#define WEECHAT_PLUGIN_RELAY_WEBSOCKET_H
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#include "relay.h"
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#include <zlib.h>
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#define WEBSOCKET_FRAME_OPCODE_CONTINUATION 0x00
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#define WEBSOCKET_FRAME_OPCODE_TEXT 0x01
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#define WEBSOCKET_FRAME_OPCODE_BINARY 0x02
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#define WEBSOCKET_FRAME_OPCODE_CLOSE 0x08
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#define WEBSOCKET_FRAME_OPCODE_PING 0x09
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#define WEBSOCKET_FRAME_OPCODE_PONG 0x0A
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struct t_relay_client;
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struct t_relay_http_request;
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struct t_relay_websocket_deflate
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{
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int enabled; /* 1 if permessage-deflate is enabled*/
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int server_context_takeover; /* context takeover for server */
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int client_context_takeover; /* context takeover for client */
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int window_bits_deflate; /* window bits for server (comp.) */
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/* ("server_max_window_bits") */
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int window_bits_inflate; /* window bits for client (decomp.) */
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/* ("client_max_window_bits") */
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z_stream *strm_deflate; /* stream for deflate (compression) */
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z_stream *strm_inflate; /* stream for inflate (decompression)*/
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};
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struct t_relay_websocket_frame
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{
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int opcode; /* frame opcode */
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int payload_size; /* size of payload */
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char *payload; /* payload */
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};
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extern struct t_relay_websocket_deflate *relay_websocket_deflate_alloc ();
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extern int relay_websocket_deflate_init_stream_deflate (struct t_relay_websocket_deflate *ws_deflate);
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extern int relay_websocket_deflate_init_stream_inflate (struct t_relay_websocket_deflate *ws_deflate);
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extern void relay_websocket_deflate_free (struct t_relay_websocket_deflate *ws_deflate);
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extern int relay_websocket_is_valid_http_get (enum t_relay_protocol protocol,
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const char *message);
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extern int relay_websocket_client_handshake_valid (struct t_relay_http_request *request);
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extern void relay_websocket_parse_extensions (const char *extensions,
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struct t_relay_websocket_deflate *ws_deflate);
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extern char *relay_websocket_build_handshake (struct t_relay_http_request *request);
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extern int relay_websocket_decode_frame (struct t_relay_client *client,
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const unsigned char *buffer,
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unsigned long long length,
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struct t_relay_websocket_frame **frames,
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int *num_frames);
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extern char *relay_websocket_encode_frame (struct t_relay_client *client,
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int opcode,
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const char *payload,
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unsigned long long payload_size,
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unsigned long long *length_frame);
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extern void relay_websocket_deflate_print_log (struct t_relay_websocket_deflate *ws_deflate,
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const char *prefix);
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#endif /* WEECHAT_PLUGIN_RELAY_WEBSOCKET_H */
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